O2 GPRS settings (Windows Mobile) 

From the home screen press Start and then select Settings.

Select the Connections tab at the bottom of the screen, and then the Connections icon.

Click on "Add a new modem connection". Name the connection o2 Mobile Web, and select Cellular Line (GPRS) from the drop down. Click Next.

The Access Point is mobile.o2.co.uk. Click Next. Enter the username mobileweb and Password password. Click Finish. 

After returning to the Connections Settings, click OK in the top right corner. To test the settings, from the home screen click Start and Internet Explorer.

In the address bar enter http://www.bbc.co.uk and click Go. The web page will load.